CVE-2021-22897

Summary

curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single "static" variable in the library, which has the surprising side-effect that if an application sets up multiple concurrent transfers, the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario, this weakens transport security significantly.

Affected Software

Weaknesses

• CWE-840: Business Logic Errors (CWE-840)

ADP Enrichment

CVE Program Container

Additional References

• https://hackerone.com/reports/1172857
• https://curl.se/docs/CVE-2021-22897.html
• https://github.com/curl/curl/commit/bbb71507b7bab52002f9b1e0880bed6a32834511
• https://www.oracle.com//security-alerts/cpujul2021.html
• https://www.oracle.com/security-alerts/cpujan2022.html
• https://security.netapp.com/advisory/ntap-20210727-0007/
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

Additional References

• https://hackerone.com/reports/1172857

References

• https://hackerone.com/reports/1172857
• https://curl.se/docs/CVE-2021-22897.html
• https://github.com/curl/curl/commit/bbb71507b7bab52002f9b1e0880bed6a32834511
• https://www.oracle.com//security-alerts/cpujul2021.html
• https://www.oracle.com/security-alerts/cpujan2022.html
• https://security.netapp.com/advisory/ntap-20210727-0007/
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

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